Car Heads Up Display 3inch Large Screen GPS Speedometer Digital OBD Plug and Play for Most Vehicles Features： 1、Large Screen and Vehicle Speed Display: With a large screen design, making it convenient for drivers to view. Real time display of the current speed of the vehicle, helping drivers to grasp the driving speed and improve driving safety. High-definition LED, clearly visible day and night. 2、USB Power Supply 0 Power Consumption: When the vehicle is turned off, the power is completely cut off, and there is no power theft. 3、GPS+Beidou Dual Chipsets: Using 10Hz high refresh rate GPS + Beidou dual-mode chip. The refresh rate is 10 frames per second, the speed of the vehicle is fast, and there is no delay. 4、Accurate Speed Display: Add the speed calibration function, which can be adjusted to be consistent with the display of the car dashboard. 5、Non-destructive Installation: Connect the USB cable to the USB port or the cigarettelighter car charger port. Specification： Features: Large Screen and Vehicle Speed Display: With a large screen design, making it convenient for drivers to view. Real time display of the current speed of the vehicle, helping drivers to grasp the driving speed and improve driving safety.?High-definition LED, clearly visible day and night. USB Power Supply 0 Power Consumption: When the vehicle is turned off, the power is completely cut off, and there is no power theft. GPS+Beidou Dual Chipsets: Using 10Hz high refresh rate GPS + Beidou dual-mode chip. The refresh rate is 10 frames per second, the speed of the vehicle is fast, and there is no delay. Accurate Speed Display: Add the speed calibration function, which can be adjusted to be consistent with the display of the car dashboard. Non-destructive Installation: Connect the USB cable to the USB port or the cigarettelighter car charger port. Specifications: Item:?Heads-Up Display Material: ABS Main Color: Black Unit:?KM/H or?MPH Optional Display the Color of Word: White and Green Optional Screen Size: 3inch Product Size: 8.5 * 5 * 2cm Package Size: 10 * 7.5 * 7.5cm Package Weight:?125g Package List: 1*?Heads-Up Display 1* USB Cable 1* Non-slip Mat 1* User Manual Special reminder: The operating voltage of this product is 5V, and a voltage higher than 5V is prohibited. Installation?Method:? 1. Insert the USB screenshot into the car USB interface and connect to the host. 2. Hide the extra lines to avoid affecting the driving. 3.Put the host engine in the center console to avoid affecting the driving place. Correct Use: Move the car to the open road after electrification 1. Display interface- -indicating the search satellite. 2. The display interface shows 0km, which indicates that the satellite can be used normally matters need attention. When the satellite is not connected, try putting the product outside the window and wait for 5-10 minutes Package List： Package List: 1*?Heads-Up Display 1* USB Cable 1* Non-slip Mat 1* User Manual